/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file    usart.c
 * @brief   This file provides code for the configuration
 *          of the USART instances.
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2023 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "usart.h"

/* USER CODE BEGIN 0 */
#include <stdio.h>
#include "string.h"
usart usart1_data = {0}; /* receive data length */
/* USER CODE END 0 */

UART_HandleTypeDef huart1;

/* USART1 init function */

void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_Init 2 */

}

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(uartHandle->Instance==USART1)
  {
  /* USER CODE BEGIN USART1_MspInit 0 */

  /* USER CODE END USART1_MspInit 0 */
    /* USART1 clock enable */
    __HAL_RCC_USART1_CLK_ENABLE();

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**USART1 GPIO Configuration
    PA9     ------> USART1_TX
    PA10     ------> USART1_RX
    */
    GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* USART1 interrupt Init */
    HAL_NVIC_SetPriority(USART1_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(USART1_IRQn);
  /* USER CODE BEGIN USART1_MspInit 1 */

  /* USER CODE END USART1_MspInit 1 */
  }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{

  if(uartHandle->Instance==USART1)
  {
  /* USER CODE BEGIN USART1_MspDeInit 0 */

  /* USER CODE END USART1_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_USART1_CLK_DISABLE();

    /**USART1 GPIO Configuration
    PA9     ------> USART1_TX
    PA10     ------> USART1_RX
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);

    /* USART1 interrupt Deinit */
    HAL_NVIC_DisableIRQ(USART1_IRQn);
  /* USER CODE BEGIN USART1_MspDeInit 1 */

  /* USER CODE END USART1_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

/**
 * @brief fputc
 *
 * @param ch
 * @param f
 * @return int
 */
int fputc(int ch, FILE *f)
{
    HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xffff);
    return ch;
}

/**
 * @brief fgetc
 *
 * @param f
 * @return int
 */
int fgetc(FILE *f)
{
    uint8_t ch = 0;
    HAL_UART_Receive(&huart1, &ch, 1, 0xffff);
    return ch;
}

/**
 * @brief process_received_data
 *
 * @param huart
 * @param data
 * @param length
 */
static void process_received_data(UART_HandleTypeDef *huart, const uint8_t *data, size_t length)
{
    if (huart->Instance == USART1)
    {
        printf("Received data: %s\r\n", data);
    }
}

/**
 * @brief HAL_UART_RxCpltCallback
 *
 * @param huart
 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if (huart->Instance == USART1)
    {
        usart1_data.rx_buf[usart1_data.rx_index++] = huart->Instance->DR;
        if (usart1_data.rx_index < (RX_BUFF_SIZE)) /* 避免数组越界 */
        {
            if ((usart1_data.rx_buf[usart1_data.rx_index - 2] == '\r') && (usart1_data.rx_buf[usart1_data.rx_index - 1] == '\n')) /* receive "\r\n" */
            {
                /* If you don't want to put data processing in the callback, you can set the data processing status */
                process_received_data(&huart1, usart1_data.rx_buf, usart1_data.rx_index); /* deal with uart1 receive data */
                memset(usart1_data.rx_buf, 0, sizeof(usart1_data.rx_buf));                /* clear receive buff */
                usart1_data.rx_index = 0;                                                 /* clear rx index */
            }
        }
        else
        {
            printf("The buffer is full! Start clear!\r\n");            /* printf full msg */
            memset(usart1_data.rx_buf, 0, sizeof(usart1_data.rx_buf)); /* clear receive buff */
            usart1_data.rx_index = 0;                                  /* clear rx index */
        }
        HAL_UART_Receive_IT(&huart1, (uint8_t *)(usart1_data.rx_buf + usart1_data.rx_index), 1); /* restart uart1 interrupt */
    }
}

/* USER CODE END 1 */
